Depends on how well you absorb it personally. For instance, if you're deficient, you need more. If you're older you need more. If you have a darker skin colo

Depends on how well you absorb it personally. For instance, if you're deficient, you need more. If you're older you need more. If you have a darker skin color you need more. It's fairly hard to get toxicity (still to be avoided). I take 50k IU per week and is good enough for me. Fat soluble so don't need it every day. But, don't take my advice on specifics...